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Vishay General Semiconductor - Diodes Division SMCG7.5CA-M3/9AT
- Part No.:
- SMCG7.5CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG7.5CA-M3/9AT.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,646
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Product details
Overview
SMCG7.5CA-M3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1 mA, 12.9 V clamping voltage (VC) at 116.3 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with a 10/1000 µs waveform - deployed on signal lines and power rails in automotive sensor units and industrial control interfaces.
For engineers reviewing the SMCG7.5CA-M3/9AT datasheet, SMCG7.5CA-M3/9AT pinout, SMCG7.5CA-M3/9AT application, or SMCG7.5CA-M3/9AT equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, halogen-free RoHS compliance, DO-215AB mechanical data, and real-world use cases in bidirectional surge protection where polarity-agnostic clamping is required.
Technical Context
The SMCG7.5CA-M3/9AT operates as a bidirectional avalanche diode, symmetrically clamping voltage transients in both polarities without requiring external polarity management. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<100 µA at VWM), while its low incremental surge resistance enables effective energy diversion during fast ESD or lightning-induced surges.
Designed for surface-mount automated placement, it meets MSL Level 1 per J-STD-020 and supports reflow up to 260 °C peak. With a thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-lead), it sustains repetitive surge events under controlled PCB pad layout (8.0 mm × 8.0 mm copper per terminal).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 8.33 V / 9.21 V at 1 mA - guaranteed avalanche onset range for reliable bidirectional triggering |
| VC @ IPPM | 12.9 V at 116.3 A - clamped voltage during 10/1000 µs surge, limiting downstream stress |
| PPPM | 1500 W - peak transient power handling capability under standardized surge waveform |
| ID @ VWM | <100 µA - ultra-low reverse leakage preserves signal integrity in high-impedance circuits |
| TJ max. | +150 °C - extended junction temperature rating supports under-hood automotive deployment |
| Package | SMCG (DO-215AB) - low-profile SMD outline with matte tin-plated leads, J-STD-002 solderable |
Pinout & Package
SMCG7.5CA-M3/9AT uses the SMCG (DO-215AB) surface-mount package: a dual-leaded, gull-wing configuration with no polarity marking (bidirectional). The case is molded with UL 94 V-0 flammability-rated compound; terminals are matte tin plated and qualified per JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive polarity) | One terminal of symmetrical PN junction - accepts surge current in either direction |
| Cathode | Transient current entry (negative polarity) | Second terminal of symmetrical PN junction - identical conduction behavior to anode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Halogen-free & RoHS compliant | M3 suffix confirms halogen-free molding compound and lead finish meeting EU RoHS Directive 2011/65/EU |
| Low-profile DO-215AB package | Height ≤ 0.058" (1.47 mm) enables compact PCB layouts in space-constrained modules |
| Fast response time | Sub-nanosecond clamping initiation protects ICs before transient energy couples into traces |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/60% RH - no baking required prior to reflow assembly |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs and microcontroller I/O pins in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping device placed directly at connector entry point to shunt transients before reaching signal conditioning circuitry. Use Value: 12.9 V clamping voltage ensures MCU GPIOs remain below absolute maximum ratings during 100 V/50 ms load dump events. | Use Scenario: Safeguarding differential CANH/CANL lines against ESD (IEC 61000-4-2) and burst noise in factory automation gateways. IC Role / Device Role / Timing Role: Symmetric TVS pair (one per line) providing common-mode and differential-mode surge suppression without polarity biasing. Use Value: 1500 W PPPM rating handles multiple 8 kV contact ESD strikes without degradation, maintaining bus integrity. |
| Consumer Power Adapter Input | Telecom DSL Line Interface |
Use Scenario: Secondary-side overvoltage protection on 5 V/12 V DC outputs of wall adapters subject to capacitor discharge transients. IC Role / Device Role / Timing Role: Standoff-clamp TVS placed across output rails to clamp overshoot from regulator instability or hot-plug events. Use Value: 7.5 V VWM allows clean regulation margin while 12.9 V VC prevents downstream LDO or USB controller damage. | Use Scenario: Protecting ADSL/VDSL line drivers and receivers from lightning-induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Bidirectional TVS installed between tip/ring and ground to divert longitudinal mode surges exceeding ITU-T K.20 limits. Use Value: 116.3 A IPPM capacity exceeds 10/700 µs telecom surge test requirements (40 A min), ensuring long-term survivability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.5CA | Same VWM (7.5 V) and VC (12.9 V), but lower PPPM (400 W) and smaller SMA (DO-214AC) package | Limited to lower-energy transients; unsuitable for automotive load dump or telecom surges | Select SMAJ7.5CA only for cost-sensitive consumer applications with <500 W surge exposure |
| SMCJ7.5CA | Identical VWM, VBR, and VC, but higher PPPM (1500 W) in larger SMC (DO-214AB) package with higher thermal mass | Better sustained surge handling and lower RθJA (40 °C/W), but requires 30% more board area | Choose SMCJ7.5CA when thermal derating or multi-pulse endurance is critical in industrial power supplies |
Compared with SMAJ7.5CA and SMCJ7.5CA, the SMCG7.5CA-M3/9AT delivers identical clamping performance in a lower-profile, AEC-Q101-qualified package optimized for automotive and space-constrained industrial designs - balancing surge robustness, qualification, and footprint efficiency.
Availability
SMCG7.5CA-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial CAN gateways, and telecom line interface cards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMCG7.5CA-M3/9AT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, precision, and application-specific validation.
The SMCG series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power, bidirectional transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where AEC-Q101 compliance and repeatable clamping are mandatory.
FAQ
What is the clamping voltage of SMCG7.5CA-M3/9AT and how is it measured?
The SMCG7.5CA-M3/9AT has a maximum clamping voltage (VC) of 12.9 V, measured at 116.3 A peak pulse current (IPPM) using a standardized 10/1000 µs double-exponential surge waveform. This value is guaranteed across temperature and represents the upper limit of voltage seen by protected circuitry during worst-case transient events - critical for ensuring downstream ICs remain within their absolute maximum ratings. The SMCG7.5CA-M3/9AT achieves this with low incremental resistance and symmetric junction design.
Is SMCG7.5CA-M3/9AT suitable for automotive applications?
Yes, SMCG7.5CA-M3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its +150 °C maximum junction temperature, MSL Level 1 reflow compatibility, and validated performance across temperature cycling, HTRB, and ESD tests confirm suitability for engine control units, ADAS sensors, and body electronics. The SMCG7.5CA-M3/9AT also meets ISO 7637-2 pulse test requirements when applied with proper PCB layout per Vishay's recommended 8.0 mm × 8.0 mm copper pads.
What does the "M3" suffix mean in SMCG7.5CA-M3/9AT?
The "M3" suffix in SMCG7.5CA-M3/9AT indicates halogen-free, RoHS-compliant construction - including both the molding compound and matte tin-plated leads - meeting JEDEC J-STD-020 moisture sensitivity and JESD 201 Class 2 whisker resistance standards. It distinguishes the part from "E3" (standard RoHS) and "HM3" (AEC-Q101 + halogen-free) variants. The SMCG7.5CA-M3/9AT is certified to these material specifications and carries full traceability documentation.
How does SMCG7.5CA-M3/9AT differ from unidirectional versions like SMCG7.5A?
The SMCG7.5CA-M3/9AT is bidirectional, meaning it clamps transients equally in both polarities with no cathode marking, whereas SMCG7.5A is unidirectional and marked with a band indicating cathode. Electrically, SMCG7.5CA-M3/9AT has identical VWM (7.5 V), VBR (8.33–9.21 V), and VC (12.9 V), but lacks forward voltage (VF) specification since it conducts symmetrically. This makes SMCG7.5CA-M3/9AT ideal for AC-coupled or polarity-agnostic lines like CAN, LIN, or telecom pairs - unlike SMCG7.5A, which requires correct orientation.
What is the recommended PCB pad layout for optimal thermal and surge performance of SMCG7.5CA-M3/9AT?
Vishay specifies a minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad area per terminal for SMCG7.5CA-M3/9AT to achieve rated 1500 W PPPM and thermal resistance (RθJA = 75 °C/W). These pads must be solid, not thermally relieved, and connected to internal ground/power planes via multiple vias. Deviating reduces surge current capacity and increases junction temperature - potentially causing premature failure. The SMCG7.5CA-M3/9AT datasheet Figure 2 provides derating curves for non-standard layouts.
SMCG7.5CA-M3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AB, SMC Gull Wing
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 116.3A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG7.5CA-M3/9AT FAQ
1.How can I place an order for SMCG7.5CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG7.5CA-M3/9AT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMCG7.5CA-M3/9AT reliable?
The price and inventory of SMCG7.5CA-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG7.5CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG7.5CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG7.5CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG7.5CA-M3/9AT?
SMCG7.5CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG7.5CA-M3/9AT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMCG7.5CA-M3/9AT?
For technical support, including SMCG7.5CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG7.5CA-M3/9AT requirements.
6.How does Aetrix verify that SMCG7.5CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG7.5CA-M3/9AT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMCG7.5CA-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG7.5CA-M3/9AT?
All SMCG7.5CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG7.5CA-M3/9AT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMCG7.5CA-M3/9AT part is unused and in its original packaging.
Return procedure for SMCG7.5CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG7.5CA-M3/9AT Tags
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